Can't upgrade from 14.04 -> 14.10

[ibob63]

Tried to do-release-upgrade -d:

It said:

Calculating the changes

Could not determine the upgrade

An unresolvable problem occurred while calculating the upgrade.

This can be caused by:
* Upgrading to a pre-release version of Ubuntu
* Running the current pre-release version of Ubuntu
* Unofficial software packages not provided by Ubuntu

If none of this applies, then please report this bug using the
command 'ubuntu-bug ubuntu-release-upgrader-core' in a terminal.

Restoring original system state

Aborting
Reading package lists... Done
Building dependency tree
Reading state information... Done
Building data structures... Done
=== Command detached from window (Wed Feb 19 21:28:06 2014) ===
=== Command terminated with exit status 1 (Wed Feb 19 21:28:06 2014) ===

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: ubuntu-release-upgrader-core 1:0.205.4
ProcVersionSignature: Ubuntu 3.11.0-17.31-generic 3.11.10.3
Uname: Linux 3.11.0-17-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.2
Architecture: amd64
CrashDB: ubuntu
Date: Wed Feb 19 21:21:06 2014
InstallationDate: Installed on 2013-05-13 (282 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64+mac (20130424)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to saucy on 2014-02-19 (0 days ago)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Dwayne Holmberg (dwayne-e)]

My upgrade was aborted because of a conflicting package (postgresql-9.3-postgis-2.1). See http://askubuntu.com/a/541406 . This was exactly the issue I was having, removing the package before upgrade solved it.

[dockedi (dockedi)]

My problem is resolved by changing packages source server from main server to Austria in repository.